<div id="banner">
<script 
                        >today=new Date();
jran=today.getTime();
function rnd() {
    ia=15675;
    ic=268856
    im=238200;
    jran = (jran*ia+ic) % im;
    return jran/(im*1.0);
};
function rand(number) {
    return Math.ceil(rnd()*number);
};
document.write("<right>");
for(i=1;i<=1;i++) {
    myNum=(rand(4)); 
    if(myNum == 1) document.write("<img class='floatleft' src='{$skin_url}/banner_01.jpg' />");
if(myNum == 2) document.write("<img class='floatleft' src='{$skin_url}/banner_02.jpg' />");
if(myNum == 3) document.write("<img class='floatleft' src='{$skin_url}/banner_03.jpg' />");
if(myNum == 4) document.write("<img class='floatleft' src='{$skin_url}/banner_04.jpg' />");
    else {
document.write();
}
};
document.write("");
</script>
</div>